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• 句法
• 描述
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

静态 Reflect .setPrototypeOf() method is the same method as Object.setPrototypeOf() , except for its return type. It sets the prototype (i.e., the internal [[Prototype]] property) of a specified object to another object or to null ，并返回 true if the operation was successful, or false otherwise .

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

句法

Reflect.setPrototypeOf(target, prototype)
					

参数

target

The target object of which to set the prototype.

prototype

The object's new prototype (an object or null ).

返回值

A 布尔 indicating whether or not the prototype was successfully set.

异常

A TypeError , if target is not an Object or if prototype is neither an object nor null .

描述

Reflect.setPrototypeOf method changes the prototype (i.e. the value of the internal [[Prototype]] property) of the specified object.

范例

使用 Reflect.setPrototypeOf()

Reflect.setPrototypeOf({}, Object.prototype)  // true
// It can change an object's [[Prototype]] to null.
Reflect.setPrototypeOf({}, null)  // true
// Returns false if target is not extensible.
Reflect.setPrototypeOf(Object.freeze({}), null)  // false
// Returns false if it cause a prototype chain cycle.
let target = {}
let proto = Object.create(target)
Reflect.setPrototypeOf(target, proto)  // false
					

规范

规范
ECMAScript (ECMA-262) The definition of 'Reflect.setPrototypeOf' in that specification.

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
setPrototypeOf	Chrome 49	Edge 12	Firefox 42	IE No	Opera 36	Safari 10	WebView Android 49	Chrome Android 49	Firefox Android 42	Opera Android 36	Safari iOS 10	Samsung Internet Android 5.0	nodejs 6.0.0

图例

完整支持

完整支持

不支持

不支持

另请参阅

• Reflect
• Object.setPrototypeOf()

元数据

• 最后修改： Jan 15, 2020

相关话题

1. 标准内置对象
2. Reflect
3. 方法
   1. Reflect.apply()
   2. Reflect.construct()
   3. Reflect.defineProperty()
   4. Reflect.deleteProperty()
   5. Reflect.get()
   6. Reflect.getOwnPropertyDescriptor()
   7. Reflect.getPrototypeOf()
   8. Reflect.has()
   9. Reflect.isExtensible()
   10. Reflect.ownKeys()
   11. Reflect.preventExtensions()
   12. Reflect.set()
   13. Reflect.setPrototypeOf()
4. 继承：
5. Object
6. 特性
   1. Object.prototype.__proto__
   2. Object.prototype.constructor
7. 方法
   1. Object.prototype.__defineGetter__()
   2. Object.prototype.__defineSetter__()
   3. Object.prototype.__lookupGetter__()
   4. Object.prototype.__lookupSetter__()
   5. Object.prototype.hasOwnProperty()
   6. Object.prototype.isPrototypeOf()
   7. Object.prototype.propertyIsEnumerable()
   8. Object.prototype.toLocaleString()
   9. Object.prototype.toSource()
   10. Object.prototype.toString()
   11. Object.prototype.valueOf()
   12. Object.setPrototypeOf()